OMAPL138如何在Linux下使用EDMA3驱动

yyj

  c: D; p7 }. q* |+ O$ L

1. [code]EDMA sample test application
   
2. /*
   # y" Y1 A+ B: C. G
3. * edma_test.c
   
4. *
   * |$ {4 v$ C% y1 T5 O
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   7 I) `$ Z2 a1 M3 T/ x
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    2 [3 U: {( e3 ?
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    , a+ A3 b( ]: D# }: J! d
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    ; N2 r& N9 {' }5 _; h) w5 S
17. * published by the Free Software Foundation version 2.
    , L2 n: o9 `. u$ b
18. *
    7 m! l; {/ d% P: U) N, S
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 \8 m* h- d1 V# f/ E3 b
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    ! W9 f5 w4 N# z2 q
24. 
    / G! n$ z' i8 \# Q* |
25. #include <linux/module.h>
    ) C2 H- {3 n$ T5 o- l1 A- K$ U
26. #include <linux/init.h>
    ! L8 b# Z4 g( R6 X" Y' q
27. #include <linux/errno.h>
    : a+ n0 ~$ ?3 ^1 i
28. #include <linux/types.h>
    2 h6 C% t4 m% b
29. #include <linux/interrupt.h>
    , U8 G. B' P3 j
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      n5 g! Z  S1 U' B' E! G
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    / V( _6 o% d& v0 U9 n- r# c( A  w
35. 
    6 m8 H7 N+ F% f! F
36. #include <mach/memory.h>
    2 k4 U  J3 q+ f9 ^
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    7 k6 ~; \6 G6 `5 [% r
40. 
    4 O: \7 Q0 {% D/ [# }
41. #undef EDMA3_DEBUG
    5 x. a2 z0 ^% f
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ) S& Z% v* l# H2 q
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    4 O4 G* E0 w- E" c
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    " f3 u6 j, C& A' {) _$ x: N
49. #define DMA_PRINTK( x... )
      W% L7 k; n" Q
50. #define DMA_FN_IN
    ; y9 x6 ~$ @0 s9 m( `* m8 W: k7 F) D
51. #define DMA_FN_OUT
    8 V& w+ C- y% a2 w5 @9 S
52. #endif
    
53. 
    - P9 H  ^  Y% [) ~# [) Z; U: E+ W
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 y" t8 z& H7 z( S& s
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
      q0 A3 q0 u5 N& F
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    ) L+ L- K7 O5 {/ I% j) Y6 g1 [4 @
62. static volatile int irqraised2 = 0;
    # n% o# n2 B# Z8 t& D$ [
63. 
    ! k  Y* ?7 Z+ X
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 D) t4 f; F1 k  [/ g6 M# T
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ' X. p9 I& k" I+ [) _
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    0 r9 @" c9 M& G/ V1 ~1 D. b2 Q$ @
71. dma_addr_t dmaphysdest2 = 0;
    5 P: m! e9 G4 z
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : F' Q: I5 n! F, ?
80. static int ccnt = 8;
    1 J( r1 ~1 `4 E" o3 c
81. 
    
82. module_param(acnt, int, S_IRUGO);
    2 L0 ?( c, \% y2 _( X5 U, M/ f
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

& _. C9 \' u0 d0 X# E0 E
* S" @# ~* G& X! U3 y) r& r      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
. ~& f; K2 A2 G( y- W6 H/ o& s/ Rarm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
( h- n+ F: v. d3 J; `- y( S7 R     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
" L/ C5 p. O) A. h1 f" T, ]9 }6 L

  F' s' w) S; e